New York Agricultural Expeirimext Station. 



99 



Table XXII. — An Increase in Amount of Protein. 



Avernge of 273 rec- 

 ords from cows 

 avera^, iug 4.5 

 jrs. old and 5.2 

 months in milk. 



After 



£P Bofore 



.a 

 o 



o 



c3 s Before 

 Aftei- 





Per 1000 Lbs. Live Weight. 



Total 

 (lltsest- 

 Ible or- 

 ganic 

 matter. 



Lbs. 

 14.9 



15.3 



Digest- 

 ible 

 pro- 

 tein. 



Fuel 

 value. 



Lbs. Cal. 



2.01 29,725 



2.42 



30,680 



Nutri- 

 tive 

 ratio. 



1:7.0 

 1:6.0 



Average Per 

 Day Per Cow. 



Milk 

 yield. 



Lbs. 

 22.5 



22.2 



Fat In 

 milk. 



Lbs. 



.92 

 .91 



Dry 



matter in 



food for 



one 111. 



of milk 



solids. 



Lbs. 



7.2 



7.6 



Digest- 

 ible dry 

 matter In 

 food for 

 each lb. 

 of milk 



solids. 



Lbs. 



4.7 

 4.9 



A REDUCTION OF PROTEIN. 



The average from 297 records wliicli cover periods when the 

 amoimt of protein in the ration was reduced give the data in the 

 following table. There was, with this reduction, a slight lower- 

 ing of the fuel value. The shrinkage in milk yield was at con- 

 siderably more than the normal rate. The moderate increase in 

 live weight was not affected by the change. 



